Metamath Proof Explorer
Description: Deduction quantifying both antecedent and consequent, based on Theorem
19.22 of Margaris p. 90. (Contributed by NM, 22-May-1999)
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|
Ref |
Expression |
|
Hypothesis |
reximdva.1 |
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Assertion |
reximdva |
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Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
reximdva.1 |
|
2 |
1
|
ex |
|
3 |
2
|
reximdvai |
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